Patient & Visitor Alert: Because flu cases are on the rise, starting February 24, children 12 and younger
will be restricted from visiting hospitals and certain inpatient facilities throughout Carolinas HealthCare System. Learn more.

Carolinas HealthCare System
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FAQs for Microbiology Mycology and Virology

What does the result reactive undiluted mean for RPR (STS) tests?
Reactive undiluted means that only the patient serum directly tested was reactive – 1:1 was the stopping point of the titer.